Methods and systems for multicast-broadcast session release and modification

A method, comprising:

• receiving, by a session management function (SMF) from an application function (AF), a multicast/broadcast (MB) session modification request including updated location information and an updated requirement on a service;
• sending, by the SMF to an access management function (AMF), an N11 MB session modification request including information associated with the updated location information and the updated requirement on the service;
• sending, by the AMF to multiple access network (AN) nodes, requests according to the N11 MB session modification request, wherein one or more of the requests are to request one or more of the multiple AN nodes to establish an MB session according to the information associated with the updated location information, and the one or more of the requests include a temporary mobile group identifier (TMGI) and updated quality of service (QoS) parameters associated with the updated requirement on the service;
• receiving, by the AMF, one or more responses from the one or more of the multiple AN nodes;
• and
• sending, by the AMF to the SMF, an N11 MB session modification response.

A system, comprising a session management function (SMF) and an access management function (AMF), wherein,

• the SMF is configured to:
• receive, from an application function (AF), a multicast/broadcast (MB) session modification request including updated location information and an updated requirement on a service;
• and
• send, to the AMF, an N11 MB session modification request including information associated with the updated location information and the updated requirement on the service;
• the AMF is configured to:
• send, to multiple access network (AN) nodes, requests according to the N11 MB session modification request, wherein one or more of the requests are to request one or more of the multiple AN nodes to establish an MB session according to the information associated with the updated location information, and the one or more of the requests include a temporary mobile group identifier (TMGI) and updated quality of service (QoS) parameters associated with the updated requirement on the service;
• receive one or more responses from the one or more of the multiple AN nodes;
• and
• send, to the SMF, an N11 MB session modification response;
• wherein the SMF is further configured to receive the N11 MB session modification response.